中文版 | English
Title

Wearable Pressure Sensors with Capacitive Response over a Wide Dynamic Range

Author
Corresponding AuthorWang, Taihong
Publication Years
2022-09-01
DOI
Source Title
ISSN
1944-8244
EISSN
1944-8252
Abstract
At present, there are mainly two types of capacitive pressure sensors based on ordinary capacitance and electrical double layer (EDL) capacitance. However, few researchers have combined these two types of capacitors in pressure sensing to improve the dynamic range of a sensor under pressure. Here, we fabricated a capacitive pressure sensor with an asymmetric structure based on poly(vinylidene fluoride-co-hexafluoropropylene) using a simple electro-spinning process. A layer of mixed ionic nanofiber membrane and a layer of pure nanofiber membrane were stacked and used as the dielectric layer of the sensor. Due to the porous structure and non-stickiness of the pure nanofiber membrane, it can be penetrated by the mixed ionic nanofiber membrane under pressure, realizing the reversible conversion from ordinary capacitance to EDL capacitance, thereby achieving a great change in the capacitance value. The sensitivities of the sensor are 55.66 and 24.72 kPa(-1) in the pressure ranges of 0-31.11 and 31.11-66.67 kPa, respectively, with good cycle stability, fast loading-unloading response time, and an ultra-low pressure detection limit as low as 0.087 Pa. Finally, this sensor was used for the detection of human physiological signals, and the sensor would have potential applications in the fields of human tactile sensing systems, bionic robots, and wearable devices.
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
Guangdong Major Scientific Research Project[2018KZDXM061]
WOS Research Area
Science & Technology - Other Topics ; Materials Science
WOS Subject
Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Accession No
WOS:000862271200001
Publisher
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:5
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/405997
DepartmentDepartment of Electrical and Electronic Engineering
Affiliation
Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Guangdong, Peoples R China
First Author AffilicationDepartment of Electrical and Electronic Engineering
Corresponding Author AffilicationDepartment of Electrical and Electronic Engineering
First Author's First AffilicationDepartment of Electrical and Electronic Engineering
Recommended Citation
GB/T 7714
Chen, Qianling,Yang, Jing,Chen, Bin,et al. Wearable Pressure Sensors with Capacitive Response over a Wide Dynamic Range[J]. ACS Applied Materials & Interfaces,2022.
APA
Chen, Qianling.,Yang, Jing.,Chen, Bin.,Feng, Jiansong.,Xiao, Songhua.,...&Wang, Taihong.(2022).Wearable Pressure Sensors with Capacitive Response over a Wide Dynamic Range.ACS Applied Materials & Interfaces.
MLA
Chen, Qianling,et al."Wearable Pressure Sensors with Capacitive Response over a Wide Dynamic Range".ACS Applied Materials & Interfaces (2022).
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